This problem can be solved by installing an electric water heater, a product that allows you to not depend on the central supply.
Cold water will pass through such a unit, turning into hot water.
Many potential buyers cannot decide on a specific model due to the variety of such units on the market.
To make it easier to choose a specific model in terms of price/quality ratio, we have compiled a rating.
It includes only the best products of 2021, which are deservedly considered the best in their class.
Rating of the TOP 25 best instantaneous water heaters of 2021
| Place | Name | Price |
| TOP 5 best instantaneous water heaters in price/quality ratio for 2021 | ||
| 1 | Stiebel Eltron DDH 8 | Find out the price |
| 2 | Thermex Chief 8500 | Find out the price |
| 3 | Electrolux NPX 8 Flow Active 2.0 | Find out the price |
| 4 | Stiebel Eltron DDH 6 | Find out the price |
| 5 | Thermex Chief 7000 | Find out the price |
| TOP 4 best instantaneous water heaters for showers | ||
| 1 | Electrolux Smartfix 2.0 6.5 TS | Find out the price |
| 2 | Atmor BASIC + 5 kW shower + faucet | Find out the price |
| 3 | Stiebel Elton IS 60 E | Find out the price |
| 4 | Zanussi 3-logic 5.5 TS (shower + tap) | Find out the price |
| TOP 4 best instantaneous water heaters for the kitchen | ||
| 1 | Electrolux Smartfix 2.0 5.5 T | Find out the price |
| 2 | Hyundai H-IWR2-5P-UI073/CS | Find out the price |
| 3 | Zanussi 3-logic 3.5 TS (shower + tap) | Find out the price |
| 4 | Atmor Lotus 5 shower faucet | Find out the price |
| TOP 4 best horizontal instantaneous water heaters | ||
| 1 | Electrolux NPX6 Aquatronic Digital | Find out the price |
| 2 | Stiebel Eltron EIL 4 Plus | Find out the price |
| 3 | Zanussi 3 Logic 6.5 TS (shower + tap) | Find out the price |
| 4 | Electrolux NPX4 Aquatronic Digital | Find out the price |
| TOP 4 best vertical instantaneous water heaters | ||
| 1 | Stiebel DCE-X 6/8 Premium | Find out the price |
| 2 | Electrolux NPX4 Aquatronic Digital 2.0 | Find out the price |
| 3 | Stiebel Eltron HDB-E 12 Si | Find out the price |
| 4 | Stiebel Eltron DHC 6 | Find out the price |
| TOP 4 best inexpensive instantaneous water heaters | ||
| 1 | Atmor Basic 5 showers | Find out the price |
| 2 | Hyundai H-IWR2-3P-UI072/CS | Find out the price |
| 3 | Electrolux Smartfix 2.0 3.5 TS | Find out the price |
| 4 | Timberk WHEL-3 OSC | Find out the price |
Why is a water heater needed?
Many city residents are forced to constantly deal with such a negative phenomenon as seasonal shutdowns of hot water at certain periods of the year.
In more acceptable cases, you only have to endure such discomfort for a couple of weeks. If we are talking about somewhat serious situations, then you have to experience all the “delights” of technical work for more than one month.
Residents of rural areas also have a hard time, since they need to almost constantly resolve the issue of heating water to a comfortable temperature. Therefore, the question of what is the best instantaneous water heater is relevant for everyone.
Which one to choose for an apartment and what to pay attention to?
Before purchasing an instantaneous water heater, you need to pay attention to several important parameters:
- Device power . The range starts from low-power ones of 3-5 kW, which supply about 5 liters of water per minute, to models consuming at least 30 kW, which can provide hot liquid to all bathrooms, bathrooms and kitchens in the house.
- Estimated load . A heater is needed for one tap or you need to provide hot water to several points.
- Type of heating element . Spiral is considered the best, as it remains clean due to high-frequency vibration.
- Productivity . A unit with a rate of 4 l/min is suitable for taking a shower, but if you want to take a bath frequently, then the required water flow rate should be 8-10 l/min.
Criteria for choosing an instantaneous electric water heater
The list of relevant parameters is not particularly large, but each of them is of no small importance. Proper selection of characteristics is the key to the efficiency of the water heater, its reliability and makes operation truly comfortable.
Device type
There are two main types of flow models:
- Non-pressure . Simple and compact devices designed for only one point. They are convenient to use when the pressure in the water supply system is low or unstable. The best and inexpensive option for a water heater for a summer residence or as a temporary heating source when hot water is turned off in the summer;
- Pressure . They are often also called systemic. They are connected to the water supply, operate under pressure and can be used to service one or several water points.
Power
The heating capacity of the device and its performance directly depend on this parameter. The optimal value can be determined by the formula:
P=Q x (T1-T2) x 0.073.
Q is the volume of water passed in l/min, and T1 and T2 are the inlet and outlet temperatures, respectively.
There is a simpler method: to get water heated to approximately 35°C, you need to multiply its planned flow rate per minute by 2.
Heating control system type
There are few options:
- Hydraulic . The temperature is regulated by water pressure;
- Electronic . The necessary parameters are set on the display and controlled by the control unit by adjusting the power when the pressure changes.
Equipment
This characteristic is more relevant for inexpensive non-pressure water heaters. Nozzle options: faucet only, hose with shower head, faucet + shower. Models up to 3.5 kW are equipped with an electrical cord with a plug that has a grounding contact. For more powerful varieties, a cable is usually not included in the kit.
Which company should you choose?
In 2021, the best manufacturers of instantaneous water heaters are:
- Electrolux . A Swedish brand that produces high-quality household appliances.
- Thermex . The brand specializes in producing high quality water heating appliances.
- Stiebel . German manufacturer engaged in the production of electric heating equipment.
- CLAGE . A well-known German brand that produces high-quality products at low prices.
- Zanussi . An Italian brand specializing in the production of household appliances.
What to look for when choosing an electric water heater
In order for the device used to bring only positive results during its use, it is necessary to pay attention to a whole set of factors.
An instantaneous electric water heater must have the following features:
Availability of two main models:
- non-pressure - simple and very compact, designed for one point; This option is convenient to use when the pressure in the flow system is low or unstable;
- pressure - can be used to service several points at once.
Power level, defined as a value dependent on the throughput, as well as on the temperature existing at the inlet and outlet.
Type of heating control system. At the present stage, there are two main options:
- hydraulic - water temperature is controlled based on the degree of its pressure;
- electronic - the necessary parameters are set thanks to the use of a special display, and control is carried out by adjusting the power level and adjusting it if it is necessary to change the pressure.
Features of the configuration that directly depend on how many people the device will be used to serve.
Ariston
The well-known company Ariston is also quite popular. The Bravo E 7023 UF 7 model has good performance - 4 liters per minute and a power of 7 kW. This model is water-pressure (can serve all water points in the house).
The case has a water heating indicator, overheating protection, and a built-in system shutdown mechanism in case of power failures, which eliminates the possibility of electric shock. The set includes a faucet, shower head, hose and water filter.
Hyundai company
In addition to machines and climate control equipment, the company also produces instantaneous water heaters. The H-IWR1-3P-CS model has proven itself to be excellent. The maximum water heating temperature is 85'C, combining a power of 3.5 kW.
Thanks to the power indicator, the system will not start without water. When purchased, the kit includes a replacement water filter, shower faucet with nozzle and hose.
It is important to keep in mind that such a device has a rather short power cord - only 1.5 meters and there is no water heating indicator on the panel.
Flaws
The disadvantages of these devices are:
- The non-pressure option can provide hot water to only one water supply point, the pressure version can supply several points, but requires a certain pressure in the system;
- It is possible to quickly heat a large volume of water only with a device that consumes from 8 to 12 kW.
The best instantaneous water heaters
Inexpensive and efficient water heaters include Electrolux Smartfix 2.0 6.5 TS. It is considered a fairly practical device, with a capacity of up to 3.7 liters per minute. Features a high power of 6.5 kW.
It is easy to install to a regular mixer. Capable of heating water up to 60 degrees. Costs about 2800 rubles. Comes with shower and tap. But it is not designed to work with old wiring. Additional costs will be required to connect it to electrical networks.
Among the more expensive water heaters, consumers note the Electrolux NPX 6 Aquatronic Digital. This water heater costs about 8,100 rubles. It can be connected to several water intake points. Capacity 2.8 liters per minute. Power 5.7 kW.
There is an electronic control system. The heating temperature can be set using the buttons. There is automatic switching on and off, overheating protection, and flow sensors. You need to find the connection cable yourself. The room must have high-quality electrical wiring.
Instantaneous water heater for tap
Flow-through electric heaters also include faucet attachments. This is a small device with a power of 2-5 kW. They consume quite a lot of electricity, because in a short time they need to heat running water, which does not linger in them.
Usually, with the help of such devices, you can wash your hands or dishes, but they are not enough for more. They dispense a maximum of 3 liters of water per minute at a temperature of 50 degrees.
